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Your search keyword '"Keqi Zhang"' showing total 4 results
Start Over Author "Keqi Zhang" Journal optical interference coatings
4 results on '"Keqi Zhang"'

1. Plasma Assisted Pulsed DC Magnetron Sputtering System for Optical Thin Film Coatings

Author

Ralph Faber and Keqi Zhang

Subjects
Materials science, Optical coating, Coating, business.industry, Pulsed DC, engineering, Optoelectronics, Plasma, Sputter deposition, engineering.material, Thin film, business, Optical thin film
Abstract

Using plasma assisted pulsed DC magnetron sputtering technology, low loss, high performance optical coatings have been achieved. Coating examples using Ta2O5 and SiO2 materials are demonstrated. This technology is suitable for volume production.

Published
2013

2. All Dielectric Low Wavefront Distortion Polarization Insensitive Beamsplitters

Author

Ali Smajkiewicz and Keqi Zhang

Subjects
Wavefront, Materials science, Optics, law, business.industry, Dielectric, Polarization (waves), business, Beam splitter, law.invention
Abstract

A polarization insensitive, low wavefront distortion 50% beamsplitter is presented. 0.2% split of s and p polarization from 1540nm to 1575nm and less than 1/30th waves peak to valley surface error at 632.8nm were achieved.

Published
2007

3. Scatter measurements of narrow band pass filters

Author

Keqi Zhang, David Dawson-Elli, Ralf Faber, Erik Schwendeman, and Paula Holmes

Subjects
Narrow band, Ion beam sputtering, Optics, Materials science, Physics::Plasma Physics, Scattering, business.industry, Significant difference, Optoelectronics, business
Abstract

The scattering behavior for narrow band pass filters processed by ion beam sputtering was evaluated and compared to that of a Corning proprietary process. Results showed no significant difference in scattering for the different processes.

Published
2001

4. Group delay and chromatic dispersion of narrow bandpass filters used in DWDM systems

Author

Ralf Faber, Jue Wang, Keqi Zhang, David Dawson-Elli, Erik Schwendeman, and Robert Wendell Sharps

Subjects
Mathematics::Combinatorics, Materials science, Optics, Band-pass filter, Computer Science::Discrete Mathematics, business.industry, Wavelength-division multiplexing, Dispersion (optics), Thin film, business, Group delay and phase delay
Abstract

The chromatic dispersion of narrow bandpass filters for DWDM application is discussed. Theoretical simulations are compared with the experimental results; the deviation of chromatic dispersion induced by manufacturing error is simulated.

Published
2001

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